That's another
research project that hasn't even reached pilot plant scale. Here is the main web site for the project:
https://www.sun-to-liquid.eu/
The preceding EU-project SOLAR-JET has recently demonstrated the first-ever solar thermochemical kerosene production from H2O and CO2 in a laboratory environment (6). A total of 291 stable redox cycles were performed, yielding 700 standard litres of high-quality syngas, which was compressed and further processed via Fischer-Tropsch synthesis to a mixture of naphtha, gasoil, and kerosene (7).
As a follow-up project, SUN-to-LIQUID will design, fabricate, and experimentally validate a more than 12-fold scale-up of the complete solar fuel production plant and will establish a new milestone in reactor efficiency. The field validation will integrate for the first time the whole production chain from sunlight, H2O and CO2 to liquid hydrocarbon fuels.
If they achieved, say, a 13-fold scale-up, that would mean producing 9100 liters of synthesis gas in the course of the project. Based on the synthesis gas composition from the previous project [1], that might yield around 3 liters of diesel. 3 liters of liquid fuel from a multi-year research project.
[1] https://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.5b00351